SPIFFE is a platform-agnostic scheme that provides a uniform identity substrate to enable secure communication across different pieces of infrastructure running in different providers and with different runtimes or software platforms.
- SPIFFE provides a stable notion of identity that allows for consistent application of security policy across different pieces of infrastructure.
- SPIFFE brings a cryptographically verifiable document that can be presented to another party to assert identity and allow for authentication.
- SPIFFE is just one piece of the puzzle and other actions must be taken to use the identity provided by SPIFFE.
- SPIFFE is useful for modeling trust domains and providing strong security isolation between them.